Table 4.

Parameter estimates and 95% confidence intervals via bootstrap for fitting the branching process model (2.10) and the Cyton model to real data. The lower bound for some highly-skewed parameters in the Cyton model are not available.

Model	Parameter		CD4 PHA			CD8 PHA
	symbol	unit	est.	lower bound	upper bound	est.	lower bound	upper bound
Branching Process Model (2.10)	N(1)(0)	cells	7.99 × 105	1.10 × 105	8.57 × 105	8.63 × 105	6.86 × 104	9.09 × 105
	N(3)(0)	cells	9.17 × 104	5.12 × 104	4.62 × 105	7.92 × 104	4.24 × 104	8.96 × 105
	p3	%	31.3	0	71.2	19.6	0	88.2
	μa+p0	hours	41.7	24.3	151	24.4	24.0	102
	va+p0	hours2	52.8	5.15 × 10−4	6.38 × 103	0.246	0	1.77 × 103
	μp	hours	19.3	4.73	70.7	15.1	11.3	29.9
	vp	hours2	19.2	0	7.74 × 103	0.839	0	485
	μa+d0	hours	25.5	0.78	76.4	34.1	20.0	299
	va+d0	hours2	3.52 × 103	1.51 × 10−3	1.00 × 105	5.26 × 103	0.39	1.00 × 105
	μd	hours	74.7	15.0	3.87 × 103	88.3	6.26	358
	vd	hours2	689	0	5.41 × 104	638	0	1.50 × 103
Cyton Model	N(0)	cells	6.75 × 105	2.09 × 105	9.26 × 105	7.95 × 105	2.68 × 105	1.69 × 106
	f0	%	73.9	17.2	100	60.9	18.7	100
	fn	%	61.6	-	100	78.0	40.0	100
	μa+p0	hours	48.6	33.6	145	29.0	-	131
	va+p0	hours2	77.5	0.05	5.73 × 103	1.97	0.39	4.63 × 103
	μp	hours	18.8	10.6	42.1	16.0	9.92	22.2
	vp	hours2	17.3	3.38	996	4.60	2.11	90.2
	μa+d0	hours	36.4	21.7	440	52.0	23.6	464
	va+d0	hours2	1.23 × 103	14.0	1.03 × 105	4.01 × 103	6.78	1.56 × 105
	μd	hours	80.9	24.6	8.71 × 103	47.3	21.0	9.00 × 103
	vd	hours2	702	0.48	1.87 × 105	105	9.54	1.85 × 105